Miniature circuit breaker handle torsion spring assembly process and equipment thereof
Technical Field
The invention relates to the technical field of automatic assembly of miniature circuit breakers, in particular to a process and equipment for assembling a handle torsion spring of a miniature circuit breaker.
Background
At present, a miniature circuit breaker is composed of an operating assembly, contacts, maintenance equipment (various kinds of trips), an arc extinguishing system, and the like. The main contact is manually operated or electrically switched on. After the main contact is closed, the main contact is locked in a closing position by the preferential tripping assembly.
Adopt the manual work to install the torsional spring in handle jack both sides, because torsional spring itself when the installation, need go to twist reverse the torsional spring to certain angle that opens, then with both ends and handle wall joint, the installation degree of difficulty is great. The assembly line is assembled manually by an operator at the present stage, the manual operation intensity is high, the assembly efficiency is low, the torsion spring needs to be clamped into position, and the two ends of the torsion spring are ensured to be clamped to the corresponding positions of the handles.
Therefore, a miniature circuit breaker handle torsion spring assembling process is developed and used for solving the problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the miniature circuit breaker handle torsion spring assembling process which has the advantages of full-automatic installation, improvement of universality, cost reduction and efficiency improvement, improvement of yield, convenience in clamping and transferring of the torsion spring, convenience in positioning, convenience in rotary installation and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a miniature circuit breaker handle torsional spring assembly process, miniature circuit breaker handle include a handle body, a handle cassette and a torsional spring, the central point of handle body puts the department and is equipped with a first locating hole to one end department is equipped with a vertical butt wall, handle cassette top is equipped with a horizontal U-shaped groove, the torsional spring cover is established on the first locating hole, and its assembly process is realized through equipment, and this equipment is including moving mechanism, stop gear, the mechanism of turning round, detection mechanism and carousel, move the mechanism the stop gear detection mechanism with turn round the mechanism and set up according to clockwise on the circumferencial direction of carousel, move the mechanism of turning round the mechanism detection mechanism with carousel electric connection to controller, its assembly process includes following step:
s10, in order to conveniently position and clamp the torsion spring, a trapezoidal groove is formed in the top end of the limiting mechanism, a first convex-shaped hollow limiting groove and a second convex-shaped hollow limiting groove are respectively formed in the two sides of the trapezoidal groove in the length direction, a first floating limiting block is inserted into the first limiting groove, a second floating limiting block is inserted into the second limiting groove, and the trapezoidal groove, the first floating limiting block and the second floating limiting block limit the torsion spring at one end of the linear guide rail;
s20, in order to facilitate detection before moving, the detection mechanism is provided with a photoelectric sensor which detects whether a torsion spring exists in the trapezoidal groove or not, and if the torsion spring exists, the next operation is carried out;
s30, in order to facilitate the transfer of the torsion spring, a transverse air cylinder is arranged at the top end of the transfer mechanism and connected to a vertical precise sliding table through a first floating joint, a finger air cylinder is arranged at the bottom end of the precise sliding table, a pneumatic finger is arranged at the bottom end of the finger air cylinder and provided with an arc opening, and the torsion spring is clamped by the arc opening and moved to an assembling jig of the rotary table;
s40, in order to facilitate the positioning of the handle assembly and the installation of the torsion spring, one end of the assembling jig is provided with a first sinking groove, a positioning column is arranged at the central position of the first sinking groove, and the handle clamping seat, the handle body and the torsion spring are sequentially sleeved on the positioning column from bottom to top;
s50, a controller controls the rotating disc to rotate through a servo motor, the assembling jig loaded with the torsion spring rotates to the lower side of the twisting mechanism, a vertical air cylinder is arranged at the top end of the twisting mechanism, the bottom end of the vertical air cylinder is connected with a stepping motor through a transverse plate, the bottom end of the stepping motor is fixedly connected with a rotating pressure head, and the torsion spring is twisted and installed at the top end of the handle body through an arc-shaped convex blocking platform by the rotating pressure head;
and S60, repeating the steps.
Preferably, in step S50, the clamping state after the installation is: the lower pin of the torsion spring is clamped with the abutting wall, and the upper pin of the torsion spring is clamped with the U-shaped groove.
Preferably, an equipment for realizing miniature circuit breaker handle torsional spring equipment technology, including a workstation, the center frame of workstation has been equipped with the carousel, the workstation is located be equipped with adjustable all around of carousel in proper order and move the year support, an adjustable locating support, an adjustable detection support, an adjustable torsion support and a defective products place the box, the top department of locating support is equipped with the torsional spring locating piece of an adjustable stair structure, workstation one end is equipped with linear guide, linear guide with torsional spring locating piece butt.
Preferably, for the convenience of torsional spring location, the one end department of torsional spring locating piece is equipped with an alignment jig to other end department is equipped with a spacing platform, the alignment jig is equipped with a plurality of first regulation holes, the top of spacing platform is equipped with the dovetail groove, the one end of dovetail groove is equipped with a breach to the downside is equipped with a criss-cross perforating hole, first spacing groove is kept away from one side of dovetail groove is equipped with a first fixed orifices, the second spacing groove is kept away from one side of dovetail groove is equipped with a second fixed orifices.
Preferably, for the convenience of torsional spring and handle assembly's location and rotatory assembly, rotatory pressure head includes the connecting portion of a cylindricality and sets up a butt portion of connecting portion bottom department, the bottom department of butt portion is equipped with a torus, the torus is equipped with protruding type keeps off the platform to the inner wall is equipped with an annular, the central point department of putting of annular is equipped with a projection, protruding type keep off the platform with the rotatory butt of torsional spring, the outer wall of connecting portion is equipped with a plurality of adjustable connecting holes.
Preferably, for the convenience of torsional spring moves to and turns round dress mechanism, it is fixed with parallel arrangement to move the top of carrying the support horizontal cylinder and one row of first slider, first slider with accurate slip table passes through guide rail sliding connection, the one end of guide rail is erect through the connecting block carry support one side, the connecting block is equipped with a first oil buffer, it is close to carry the support one side of accurate slip table is equipped with a second oil buffer, the bottom department of accurate slip table is equipped with a connecting plate, the bottom department of connecting plate is equipped with the finger cylinder, the finger cylinder is close to the both sides that pneumatic finger are equipped with a first magnetic switch and a second magnetic switch respectively, first magnetic switch with second magnetic switch is connected to the controller.
Preferably, for the convenience of the torsional spring is in the location before moving the year, the top of locating support is equipped with an adjustable L shaped plate, the top of L shaped plate is equipped with the torsional spring locating piece, one side of torsional spring locating piece length direction is equipped with photoelectric sensor, photoelectric sensor passes through the regulating block and fixes to the horizontal pole, and with controller electric connection, the horizontal pole with the detection support passes through the adjustable connection of cross fixation clamp.
Preferably, in order to improve the efficiency of the twisting assembly, the top end of the twisting support is fixedly connected with a vertical slide rail and the vertical cylinder, one end of the transverse plate is connected with the bottom end of the vertical cylinder through an I-shaped part in an inserting mode, the other end of the transverse plate is connected with the slide rail through a second slide block in a sliding mode, a third hydraulic buffer is arranged on the lower side of the transverse plate, a third magnetic switch and a fourth magnetic switch are arranged at the two ends of the vertical cylinder respectively, and the third magnetic switch and the fourth magnetic switch are connected with the controller in an electric mode respectively.
Preferably, in order to facilitate continuous assembly operation of the top end of the rotary table, the center of the rotary table is movably connected with a cam divider, second sinking grooves are uniformly distributed in the circumferential direction and fixedly connected with the assembly jig through a third fixing hole, an opening is formed in one end of each first sinking groove, a fan-shaped groove is formed in the other end of each first sinking groove, and the fan-shaped grooves are connected with the bosses in an inserted mode.
Preferably, in order to provide a driving force for the turntable, one end of the cam divider is in transmission connection with the servo motor through a belt, the other end of the cam divider is provided with a cam, the cam abuts against a sensor probe, a groove-shaped photoelectric switch is erected on the upper side of the sensor probe, and the groove-shaped photoelectric switch is electrically connected with the controller.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. as the miniature circuit breaker handle torsional spring equipment of full-automatic assembly line, through with handle torsional spring location, move and carry, rotatory stir, realized the automatic installation of miniature circuit breaker handle torsional spring, replaced artifical equipment, saved the manpower, improved work efficiency, improve the commonality of using with series of products.
2. The torsional spring locating piece is convenient for adjust to set up the stopper that floats, the torsional spring is got to pneumatic finger clamp of being convenient for.
3. The annular groove, the convex column and the convex type blocking platform of the rotary pressure head of the profile design are convenient for positioning and clamping of a torsion spring, a circle center included angle of the connecting hole of the outer wall is a right angle, the rotary angle of the convex type blocking platform is limited, and the installation efficiency is improved.
4. The assembly jig exposes the second sinking groove, so that detection and assembly of the handle and the torsion spring are facilitated.
5. The equipment tool sets up opening, fan-shaped groove, reference column, and convenient location cooperates with rotatory pressure head simultaneously, improves torsional spring installation yield.
Drawings
Fig. 1 is a perspective view of an assembling apparatus of a handle torsion spring of a miniature circuit breaker according to the present invention.
Fig. 2 is a schematic view of an internal structure of an assembling apparatus of a handle torsion spring of a miniature circuit breaker according to the present invention.
Fig. 3 is an enlarged view of the invention at a in fig. 2.
Fig. 4 is a schematic structural diagram of the transfer mechanism and the limiting mechanism of the present invention.
FIG. 5 is a schematic structural view of the positioning block of the torsion spring according to the present invention.
Fig. 6 is a perspective view of the twist mechanism of the present invention.
Fig. 7 is a schematic structural diagram of the twisting mechanism of the present invention.
Fig. 8 is a schematic structural diagram of the rotary pressure head of the invention.
FIG. 9 is a schematic view of the cam divider and the turntable according to the present invention.
Fig. 10 is a top view of the turntable according to the present invention.
Fig. 11 is a schematic structural view of the assembly jig of the present invention.
Fig. 12 is a schematic structural view of the handle body and the handle holder according to the present invention.
Fig. 13 is a schematic structural view of the handle holder according to the present invention.
Fig. 14 is a structural schematic diagram of the handle body according to the present invention.
FIG. 15 is a schematic structural view of the torsion spring according to the present invention.
Wherein: 5. a feeding mechanism; 501. a linear guide rail; 10. a transfer mechanism; 1001. a transfer support; 1002. positioning the bracket; 11. a transverse cylinder; 111. a first floating joint; 12. a precision sliding table; 125. an electronic sensor switch; 13. a connecting plate; 14. a finger cylinder; 141. a first magnetic switch; 142. a second magnetic switch; 15. a pneumatic finger; 151. an arc opening; 161. connecting blocks; 162. a first slider; 165. a first hydraulic buffer; 18. an L-shaped plate; 19. a torsional spring positioning block; 191. an adjusting table; 1910. a first adjustment aperture; 192. a limiting table; 193. a through hole; 194. a notch; 195. a first limit groove; 1951. a first fixing hole; 196. a second limit groove; 1961. a second fixing hole; 197. a trapezoidal groove; 198. a first floating limiting block; 199. a second floating limiting block;
20. a twisting mechanism; 21. twisting the bracket; 22. a slide rail; 23. a second slider; 24. a transverse plate; 25. a stepping motor; 26. rotating the pressure head; 261. a connecting portion; 262. an abutting portion; 263. connecting holes; 264. an annulus; 265. a convex block platform; 266. a ring groove; 267. a convex column; 27. a vertical cylinder; 271. a third magnetic switch; 272. a fourth magnetic switch; 28. a H-shaped workpiece; 29. a third hydraulic buffer;
30. a turntable; 31. a second sink tank; 32. assembling a jig; 33. an opening; 34. a sector groove; 35. a positioning column; 37. a third fixing hole; 39. a first sink tank;
40. a work table; 45. a defective product placing box; 46. a detection mechanism; 461. detecting the bracket; 462. a cross fixing clamp; 463. a cross bar; 464. an adjusting block; 465. a photosensor;
50. a cam divider; 51. a servo motor; 53. a cam; 54. a sensor probe; 55. a groove-type photoelectric switch; 60. a limiting mechanism;
100. a handle body; 101. a first arcuate wall; 102. a first positioning hole; 103. a jack; 104. an abutment wall; 105. a step; 106. a convex block;
200. a torsion spring; 201. a lower pin; 202. an upper pin;
300. a handle clamping seat; 301. a second positioning hole; 302. a baffle groove; 303. a U-shaped groove; 304. a boss; 305. a support block; 306. a second arcuate wall.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
In fig. 12 to 15, a miniature circuit breaker handle torsion spring assembly process includes a handle body 100, a handle holder 300 and a torsion spring 200.
Fig. 1, in fig. 2 and fig. 4, an assembly equipment for realizing miniature circuit breaker handle torsional spring assembly process, including a workstation 40, the centre frame of workstation 40 is equipped with carousel 30, workstation 40 is located carousel 30 and is equipped with one adjustable all around in proper order and moves and carry support 1001, an adjustable locating support 1002, an adjustable detection support 461, box 45 is placed with a defective products to an adjustable torsion support 21, the top department of locating support 1002 is equipped with the torsional spring locating piece 19 of an adjustable stair structure, the torsional spring locating piece 19 top is equipped with the stopper that floats, workstation 40 one end is equipped with linear guide 501, linear guide 501 and torsional spring locating piece 19 butt, linear guide 501 carries torsional spring 200 to the dovetail groove 197 of torsional spring locating piece 19.
In fig. 5 and 4, an adjusting table 191 is disposed at one end of the torsion spring positioning block 19, the adjusting table 191 is disposed with a plurality of first adjusting holes 1910, the first adjusting holes 1910 adjust the horizontal distance of the torsion spring positioning block 19, the L-shaped plate 18 adjusts the vertical distance of the torsion spring positioning block 19, a limiting table 192 is disposed at the other end of the torsion spring positioning block 19, a trapezoidal groove 197 is disposed at the top end of the limiting table 192, a notch 194 is disposed at one end of the trapezoidal groove 197, a cross-shaped through hole 193 is disposed at the lower side of the trapezoidal groove 193, a first fixing hole 1951 is disposed at one side of the first limiting groove 195 away from the trapezoidal groove 197, the first fixing hole 1951 is inserted into the first floating limiting block 198, a second fixing hole 1961 is disposed at one side of the second limiting groove 196 away from the trapezoidal groove 197, and the second fixing hole 1961 is inserted into the second floating limiting block 199. The positioning support 1002, the L-shaped plate 18 and the torsion spring positioning block 19 are beneficial to adjusting and mounting of the torsion spring 200, so that the same type of products can be conveniently used, and the universality of the miniature circuit breaker handle torsion spring assembling equipment is improved.
In fig. 8, the rotary ram 26 includes a cylindrical connecting portion 261 and a butting portion 262 disposed at the bottom end of the connecting portion 261, the bottom end of the butting portion 262 is provided with a torus 264, the torus 264 is provided with a curved convex block platform 265, and the inner wall is provided with an annular groove 266, the central position of the annular groove 266 is provided with a convex column 267, the convex column 267 is inserted into the center of the torsion spring 200, the convex block platform 265 is rotatably butted against the torsion spring 200, the outer wall of the connecting portion 261 is provided with two adjustable connecting holes 263, the included angle of the adjacent connecting holes 263 is 90 °, the convex block platform 265 is disposed outside the included angle, the connecting holes 263 and the convex block platform 265 cooperate to rotationally clamp the torsion spring 200.
In fig. 4, a transverse cylinder 11 and a row of first sliders 162 which are arranged in parallel are fixed at the top end of a transfer support 1001, the first sliders 162 are slidably connected with a precision sliding table 12 through a guide rail 16, one end of the guide rail 16 is erected on one side of the transfer support 1001 through a connecting block 161, the connecting block 161 is provided with a first oil pressure buffer 165, one side of the transfer support 1001 close to the precision sliding table 12 is provided with a second oil pressure buffer 166, the second oil pressure buffer 166 reduces vibration when the transverse cylinder 11 drives the precision sliding table 12 to move horizontally, a connecting plate 13 is arranged at the bottom end of the precision sliding table 12, a finger cylinder 14 is arranged at the bottom end of the connecting plate 13, two sides of the finger cylinder 14 close to a pneumatic finger 15 are respectively provided with a first magnetic switch 141 and a second magnetic switch 142, the first magnetic switch 141 and the second magnetic switch 142 are connected to a controller, the controller is a PLC controller, and the first magnetic switch 141 and the second magnetic switch 142 control the vertical distance of the pneumatic finger 15.
In fig. 3 and 4, an adjustable L-shaped plate 18 is disposed at the top end of the positioning bracket 1002, a torsion spring positioning block 19 is disposed at the top end of the L-shaped plate 18, a photoelectric sensor 465 is disposed on one side of the torsion spring positioning block 19 in the length direction, the photoelectric sensor 465 is fixed to the cross bar 463 through an adjusting block 464 and electrically connected to the PLC controller, and the cross bar 463 is adjustably connected to the detecting bracket 461 through a cross fixing clip 462. The photosensor 465 is disposed opposite the torsion spring 200 in the trapezoidal groove 197.
In fig. 6 and 7, a vertical slide rail 22 and a vertical cylinder 27 are fixedly connected to the top end of the torsion bracket 21, one end of the horizontal plate 24 is inserted into the bottom end of the vertical cylinder 27 through the i-shaped member 28, the other end of the horizontal plate 24 is slidably connected to the slide rail 22 through the second slider 23, a third hydraulic buffer 29 is disposed on the lower side of the horizontal plate 24, a third magnetic switch 271 and a fourth magnetic switch 272 are respectively disposed at two ends of the vertical cylinder 27, and the third magnetic switch 271 and the fourth magnetic switch 272 are respectively electrically connected to the controller. When the vertical cylinder 27 moves up and down, the second slider 23 moves up and down on the slide rail 22, and when the work 28 abuts against the third hydraulic buffer 29, the stepping motor 25 controls the rotary ram 26 to be pressed down and rotated.
In fig. 9 and fig. 10, a cam divider 50 is movably connected to the center of the rotary plate 30, one end of the cam divider 50 is connected to a servo motor 51 through a belt, and the other end of the cam divider 50 is provided with a cam 53, and second sinking grooves 31 are uniformly distributed in the circumferential direction, the second sinking grooves 31 are fixedly connected to the assembling jig 32 through third fixing holes 37, one end of each first sinking groove 39 is provided with an opening 33, and the other end of each first sinking groove is provided with a fan-shaped groove 34, and the fan-shaped grooves 34 are inserted into the bosses 304. The cam 53 is abutted to a sensor probe 54, a groove-shaped photoelectric switch 55 is erected on the upper side of the sensor probe 54, and the groove-shaped photoelectric switch 55 is electrically connected with the PLC.
The handle body 100 comprises a first arc-shaped wall 101, a first positioning hole 102 is arranged at the center of the first arc-shaped wall 101, a jack 103 is arranged at the inner wall, a vertical abutting wall 104 is arranged at one end of the first arc-shaped wall 101, a step 105 is arranged at the other end of the first arc-shaped wall, and a convex stop 106 is arranged at the outer wall of the step 105.
The handle holder 300 is provided with a second arc-shaped wall 306, the second arc-shaped wall 306 is connected to the second positioning hole 301 through a supporting block 305, the top end of the second arc-shaped wall 306 is provided with a transverse U-shaped groove 303, the bottom end of the second arc-shaped wall 306 is provided with a boss 304, a blocking groove 302 is arranged between the second arc-shaped wall 306 and the supporting block 305, and the protruding block 106 is clamped with the blocking groove 302. The handle body 100 and the handle holder 300 form a clamping combination.
The torsion spring 200 is sleeved on the first positioning hole 102, the insertion hole 103 is inserted with a U-shaped connecting rod, the assembly process is realized through assembly equipment, in the attached drawings 1 and 2, the assembly equipment comprises a transfer mechanism 10, a limiting mechanism 60, a twisting mechanism 20, a detection mechanism 46 and a turntable 30, the transfer mechanism 10, the limiting mechanism 60, the detection mechanism 46 and the twisting mechanism 20 are arranged on the circumferential direction of the turntable 30 in the clockwise direction, the transfer mechanism 10, the twisting mechanism 20, the detection mechanism 46 and the turntable 30 are electrically connected to a PLC controller, and the assembly process comprises the following steps:
s10, the limiting mechanism 60 comprises an adjustable positioning support 1002, an adjustable L-shaped plate 18 and an adjustable torsion spring positioning block 19 which are sequentially connected from bottom to top, a trapezoidal groove 197 is formed in the top end of the torsion spring positioning block 19, a first convex-shaped hollow limiting groove 195 and a second convex-shaped hollow limiting groove 196 are respectively formed in two sides of the length direction of the trapezoidal groove 197, a first floating limiting block 198 floating up and down is inserted into the first limiting groove 195, a second floating limiting block 199 floating up and down is inserted into the second limiting groove 196, the first floating limiting block 198 and the second floating limiting block 199 are symmetrically arranged on two sides of the trapezoidal groove 197, and the trapezoidal groove 197, the first floating limiting block 198 and the second floating limiting block 199 limit the torsion spring 200 at one end of the linear guide 501 of the feeding mechanism 5, which is detailed in attached figures 2, 4 and 5.
S20, the detection mechanism 46 is provided with a detection support 461, the detection support 461 is in adjustable connection with a photoelectric sensor 465, the photoelectric sensor 465 detects whether the torsion spring 200 exists in the trapezoid-shaped groove 197, if the torsion spring 200 exists, the PLC controller controls the shifting mechanism 10 to carry out the next operation, and details are shown in the attached figures 3, 4 and 5.
S30, the transferring mechanism 10 is provided with an adjustable transferring support 1001, the top end of the transferring support 1001 is provided with a transverse air cylinder 11, the transverse air cylinder 11 is connected to a vertical precise sliding table 12 through a first floating joint 111, the precise sliding table 12 is provided with an upper electronic sensor switch 125 and a lower electronic sensor switch 125, the electronic sensor switches 125 are electrically connected with a PLC (programmable logic controller), the bottom end of the precise sliding table 12 is connected with a finger air cylinder 14 through a connecting plate 13, the bottom end of the finger air cylinder 14 is provided with a pneumatic finger 15, the inner wall of the pneumatic finger 15 is provided with an arc port 151, the torsion spring 200 is clamped by the arc port 151 and is moved onto an assembling jig 32 on the circumference of the rotary table 30, and details are shown in figures 4 and 10.
S40, in the attached drawing 11, one end of the assembling jig 32 is provided with a first sinking groove 39, a positioning column 35 is arranged at the center of the first sinking groove 39, the handle clamping seat 300, the handle body 100 and the torsion spring 200 are sequentially sleeved on the positioning column 35 from bottom to top, and the opening 33 of the first sinking groove 39 is lapped with the handle deflector rod.
S50, the PLC controls the rotation of the turntable 30 through a servo motor 51, the assembling jig 32 loaded with the torsion spring 200 rotates to the lower side of the twisting mechanism 20, the twisting mechanism 20 is sequentially connected with a twisting support 21, a vertical sliding rail 22, a second sliding block 23, a transverse plate 24 and a stepping motor 25 from bottom to top, a vertical air cylinder 27 is further arranged at the top end of the twisting support 21, the bottom end of the vertical air cylinder 27 is connected with the stepping motor 25 through the transverse plate 24, the bottom end of the stepping motor 25 is fixedly connected with a rotary pressure head 26, and when the bottom end of the I-shaped part 28 is abutted to a third oil buffer 29, the rotary pressure head 26 twists the torsion spring 200 at the top end of the handle body 100 through a convex baffle 265; the lower pin 201 of the torsion spring 200 is clamped with the abutting wall 104, and the upper pin 202 of the torsion spring 200 is clamped with the U-shaped groove 303, as shown in fig. 2, fig. 6 and fig. 10 in detail.
And S60, repeating the steps.
The transfer mechanism 10 of the torsion spring 200 pushes down the floating limit block of the torsion spring from the handle torsion spring limit mechanism 60, the pneumatic finger 15 clamps the torsion spring 200 and puts the handle assembly (the handle body 100 and the handle clamping seat 30 assembly) into the turntable 30, the handle assembly is put into the assembling jig 32 of the positioning handle, the lower pin 201 of the torsion spring 200 is clamped with the abutting wall 104, and the upper pin 202 of the torsion spring 200 is clamped with the U-shaped groove 303. Carousel 30 is rotatory to next station, vertical cylinder 27 stretches down, rotatory pressure head 26 slightly presses on torsional spring 200, projection 267 is positioned in first locating hole 102, step motor 25 drives rotatory pressure head 26 rotatory, rotatory pressure head 26 goes up the protruding type of putting and keeps off platform 265 and stir torsional spring 200's pin to one side, when the pin was stirred to another pin draw-in groove position upside of handle subassembly 26, torsional spring 200's pin keeps off the platform 265 landing and gets into in handle subassembly's the pin draw-in groove from the protruding type on rotatory pressure head 26.
The above are only specific application examples of the present invention, and do not limit the scope of the present invention in any way. The technical solutions formed by using equivalent transformation or equivalent substitution are all within the protection scope of the present invention.